高一英语第二模块第三单元课文第二课时教学案——课前预习案——Computers _____ in offices and homes since 1970s.A. have been used B. had been used C. was D. has been used2. I like these English songs and they _____many times on the radio.A. taught B. have taught C. are taught D. have been taught——课中探究案——一、检查反馈，导入新课。听写单词：检查课文中的短语_____________________________________________二、目标定位，确定重点。三、自主探究，教师点拨。Step Ⅵ: Important sentences 一：. …， And I wondered if I would grow any larger. ① if ① if 意为“是否”，引导宾语从句② any 修饰形容词比较级。其它修饰形容词比较级的词有 rather, much, still, even, far, a lot, a little, a great deal, far, a bit 等。 [练习] —Is it safe enough to stand here, Mom ? —No, come a bit______ to me, honey. A. close B. closely C. closer D. more closely 二：现在完成时的被动语态强调一个发生在过去的被动性动作持续 到现在，或对现在造成的影响或结果。 1.现在完成时的被动语态的构成 have / has + been + 及物动词的过去分词 2.现在完成时的被动语态的形式 1).肯定式：主语 + have / has + been + 过去分词 + 其他2)否定式：主语 + have / has + not + been + 过去分词 + 其他The house has not been cleaned for a long time. 这房子很久没有打扫了。3)一般疑问式：Have / Has + 主语 + been + 过去分词 + 其他？Has my letter been received by you? 你收到了我的信了吗？四、尝试演练，合作解疑。句型转换Mom has cleaned the windows for weeks.The windows by mom for weeks.Tom has give me two tickets for the new play.I two tickets for the new play.3. We have planted some trees around the lake. 4. My father has locked the door. 五、当堂检测，拓展延伸。1. Every possible means (use) to prevent the air pollution, but the sky is still not clear.2. Some new oilfields (open up) since 1976.六、课堂小结，布置作业。完成练习册 31 页练习
